The design of wirless gateway based on ZigBee and Ethernet establishes interconnection between the ZigBee Sensor Network and Ethernet Network to make the equipment used in monitoring and the Internet linked effectively. It does not only accomplish date translation and protocol conversion between them transparently, but also provides with a wider telecontrol platform for the ZigBee Sensor Network further. In this paper, the authors give the hardware design of the gateway based on CC2430 and RTL8019, and propose a method of the protocol conversion.